Load-handling mechanism



Oct. 7, 1930. E. H; vREMDI?.

LOAD HANDLING MECHANSM Filed Dec. 1o, 192s asnees-sheet 5 Sheets-Sheet 2Oct. 7, 1930. E. H. REMDE LOAD HANDLING MECHANISM Filed Dec. 10 1925oct. 7, 1930.

E. H. REMDE LOAD HANDLING MECHANI SM.

Filed Dec. lO 1923 5 Sheets-Sheet 3 /f /ffa/ E. H. REMD'E 1,777,475

LOAD HANDLING MECHANISM Y Filed neo. lo, 192s 5 sheets-sheet 4 Oct.` 7,1930.

Oct. 7, 1930. E. H. REMDE LOAD HANDLING MECHANISM Filed Dec. 10, 1923 5Sheets-Sheet www. Yum

Patented Oct..v 7, 1930 UNITED STATES PATENT OFFICE EDWARD H. RENDE,0.75' CLEVELAND, HIG, ASSIGNR TO THE BAKER-RAULANG C01!"- proved meansfor engaging and moving a parts shown in Fig. 3. load in differentdirections, at will, for dump- Fig is front elevation of the operatinging, transporting or elevating purposes. mechanism and cable drums andthe holding Another' ob'ect of the invention is to proand release meansfor the latter, parts being vide, in a loa handling mechanism having abroken away. 65 crane and a hoisting or load engaging device, Fig. 6 isa section on the line 6 6 of Fig. 5. improved means for operating thecrane and Figs. 7, 8 and 9 are sections onthe lines hoisting deviceindependently of each other 7-7, 8-8 and 9 9 respectively of Fig. 6.from a single motor and power transmitting Fig. lOis a diagram showingthe electric mechanism. circuits for the motor which drives the op-Another object ofthe invention is to comerating mechanism, the meanswhich release bine with a load handling mechanism hav# the drum holdingmeans and the traction moing a crane and a hoisting device operated byitor, and the controllers or switch devices for a pair of drums,improved driving means closing the circuits. foithe drums, whereby theoperations of the In the drawings, 1 indicates a frame of any 75 craneand device may be readily controlled desired shape and form, preferablyconand carried out. structed from channel and angle bar's suit- Anotherobjectof the inventionis to com. ably connected by rivets or otherwise.In bine with a load'handling mechanism having the illustrated form ofconstruction the frame a crane and a hoisting v`device operated by a 1comprises a main portion 1a on which the 80 pair of drums, adifferential mechanism for -mechanisms for raising and lowering loadsoperating the rope or cable drums and to proandmoving the load carryingmember, to be vide improved means for controlling the oplater referredto, yare supported, and a plateration of the differential mechanism,whereform portion 1b, on which loads may be l. .by ra single motoroperating therethroughvplaced; this latter frame portion serving as maybe utilized to operate the crane or hoista supplemental support for aload, especially ing device at will. v where it is necessary totransport the load to A further object of the invention is to proadistant point by the driving or operation of vide an improved truckhaving a load hanthe truck. In this connection, it will be undlingmechanism and novel means for operderstood that the platform portion lbmay 90 ating the load handling mechanism in a simbe rigidly connected tothe frame la and it ple and rapid manner. may be a continuation thereofor disposed Other objects of the invention will be apin a` planetherebelow, as shown in the parent lto those skilled in the art to whichdrawings; or ythe platform portion lb may my invention relates from thefollowing deembody or have incorporated 1n or as- 95 'scription taken intconnection with the acraim, or cLnv-ELAND, omo; A CORPORATION or omo iamphetamine rrncrramsrr application fue@ necember 1o, i923.v serial No.679,605.

This invention relates toa load handling mechanism, whereby a load orloads may be readily raised and lowered, or transported from one plac toanother, and discharged.

One object of the invention is to construct an apparatus of thischaracter of relatively simple construction and capable of beingoperated rapidly and economically.

Another object of the invention is to provide a load handling mechanismhaving im- Fig. 2 is an end elevation 'of the truck and load handlingmechanism .(with parts broken away), the latter being shown slewed orswiveled about its pivot to one operative position to illustrate itsmanner of use.

Fig. 3 is aV fragmentary side view of the motor, powertransmittingrmechanism and operating means for the crane and hoistingdevice operating ropes.

Fig. 4 is a top plan of the mechanism and 60 sociated with it `asuperposed platform, which may be raised or lowered relative to theframe 1. Where the frame is constructed' as shown in the drawings, Ipreferably provide a pair of relatively small trailing wheels companyingdrawings, wherein y Fig. l is a side elevation of a truck and a loadhandling mechanism embodying my invention.

2 below the platformportion 1" and a pair of relatively large wheels 3below the main A frame portion 1.

4 indicates a motor, the shaft of which througha suitablepowertransmittingmechanism drives the wheels 3 ifn either direction', suchmechanism being shown enclosed in a suitable housing 4. 5 indicates asuspension mechanism to permit of relative movements between the motorand housing and the frame 1 incident to the driving of the truck, suchmechanism being similar to that shown in Letters Patent No. 1,628,145granted to John H. Hertner and myself jointly. 6 indicates pairs ofcasingelements enclosing suitable springs between the frame 1 andhousing 4.

By preference, the pairs of wheels 2, 3, are mounted on knuckleswhereby, through` the v connections indicated at 9 and steer handle 32,they may be simultaneously steered. 11 indicates a platform for anoperative suitably supported on the frame 1. 14 indicates uprightsrigidly connected to the frame 1 and forming a support for a dash 15.The dash 15 preferably supports the levers for operating certain of thecontrolling or operating elements for the truck and the load supportingand lenga ing member, whereby the severaloperations of driving, steeringand handling the load and load carrying Imember are effected. 16-indicates a foot pedal associated vwith the platform 11, and arranged tocontrol the release and application of a brakeV mechanism, indicated asan entirety at 17, the latter being normally biased by a spring (notshown) into engagement with an element driven directly by the motor 4,as will be understood from Fig. 1.

23 indicates as an entirety a controller for .goethe motor 4. The shaft24 of the controller is operated through an arm 25 and link 26 by alever 27, which'is pivoted on the dash 15. 28 indicates as an entirety aswitch mechanism (1) connected by a rod 28a with the brake mechanism 17,whereby movement of the pedal 16 opens or closes the motor circuit, thepurpose being to prevent operation of the motor 4 byl means of thecontroller if the latter is moved from its ofi position in eitherdirectionwhen the brake is in its applied position; and (2)interconnected with the controller by means of a' link 28" to preventclosing of the circuit inthe` event the' controller lever is in or ismoved to an on position and attempt is/made to release the brake.

34 indicates. a frame for supporting the batteries (enclosed in a sheetmetal casing 36) a load supporting member, such as a boom 40, a motor41, a power transmitting mechanism 42 and operating means 43, 44, whichwill later be described. The frame 34 l is .mounted on a suitablevertically arranged shaft disposed between uprights 37 and provided witha gear 47 whlch serves las a suit-l able element by means of which theframe or support 34 is rotated in either direction about hollow bosses,to form bearings for a pivot.

pin 52. 4

-The boom 40 preferablycomprises a pair of channel ,members 40a securedtogether in spaced relation by a plurality of cross-pieces 40". Thelower ends of thechannel bars 40 are provided with suitable knucklesthrough which the pivot pin 52 extends, the opposite ends of the pinbeing provided with nuts 54 to prevent the pin frommoving endwise in'the knuckles. The boom 40 is raised and lowered about the pivot in 52 byany suitable means, but prefera ly by means of a cable or other flexibleconnection 40 connected to the operating means 43.

55 indicates as an entirety a load engaging member such as a clam shellbucket or a platform, but for illustrative purposes I have shown suchmember as comprising a hook depending from a casing 56, whichyin turn issupported or suspended from the free end of the boom 40 by a cable orother flexible connection v57, connected' with the operating means 44 aswill be later described.

The operating means 43,v 44, comprise a pair of drums 58, 59, on whichthe cables 40', 57, respectively, wind and unwind, for swinging the boom40 about its pivotal support and for raising/or lowering the loadengaging member 55. The dr tated independently of ea h other ineitherdirectionin the manner to be later set forth, to swing the boom 40 andraise or lower the member 55. The cable 40 may be connected at its innerend to the drum 58 in any desired manner. From the drum 58, the cable ms58, 59, are roy 40ileads to and reeves through and around izo sheave69,supported on the adjacent upright member 37, and then around a sheave 70loosely mounted o n one of the reinforcingy bosses. -From the sheave 70the cable 57 ex'- tends overa sheave 71, mounted, on a shaft 71, whichis supported at its opposite ends by the plates 53. From the sheave 71the cable reeves around a sheave 72 supported in the free end of theboom 40, then around a i sli'eave 7 3 mounted inthe casing 56, and thenaround a second sheave supported on the shaft 72a, the outer-end of thecable being carried down and connected by a socket and loop to the shaftofthe sheave 73.

-102 indicates as an entirety a casting shaped and constructed to formaHcradle 102 for the 'motor 41 and a housing section 102b for the powertransmitting mechanism42. The end walls of the housing section 102b areformed with openings 103 through which the driving means for the drums58, 59, extend, as will be hereinafter described. The end walls of thehousing 102b form suitable seats for a pair of annular vsupporting disksor members 104. and such walls and members are formed with alignedopenings to receive cap screws 105 which rigidly secure them togetherand the members 104 are provided'Y with integral extensions to providefeet 106, each of which is secured to an angle 107cm'- ried by anadjacent portion of the frame 34. The feetlO operate through the disksor members 104 and the housingl and cradle casting 102 to support themotor 41 and power transmitting mechanism 42 in fixed relation upon thesupport 34 and in operative relationship to each other. The motor 41 isiixed tosthe cradle 102a by a plurality of screws 107 108 indicates ahousing section shaped to fit upon the open end of the housing tion 102and be clamped thereto andv also to enclose the propeller shaft 109connected to the shaft ofthe motor 41. The housing sec-- tion 108 isadapted to support a pair of spaced bearings for the propeller shaft.Between the propeller shaft bearings, the vshaft is pro= vided with aworm 110 which meshes with and drives a gear 11'1 forming one of theele-A ments of the power transmitting mechanism 42.

The power transmitting mechanism 42 for the operating'means 43, 44, maybe of any desired construction. 'I preferto use lsome form of gearmechanism and accordingly show for illustrative purposes a well knowntype' of differential mechanism, such as is commonly used .for drivingthe wheels of automobil/es. Preferably, such mechanism is similar inconstruction tothe differential mechanism used by me for-driving thewheels 3 from the motor 4. By the,use of a ldif-v. ferential mechanism asingle motor may be employed to. operate either opeiating means.

through the-co-operation of certain devices and means, to be laterdescribed, for holding or releasing the driven elements of thedifferential mechanism, whereby either drum will be rotated in a simplemanner. In the illustrated form of construction, the Adifferentialmechanism comprises the main gear or worm geai '111already referred to,connected to a casing 112 having oppositely extending hubs 113. The hubs113 are mounted in suitable bearings 114 seated in pillow blocks 115,carried by the housing sections 102", 108, and secured together in anywell known manner. As shown in Fig. 5, the hubs 113 are reduced to formseats for the inner races of the bearings 114. 1142, 1,14", indicatering nuts screw threaded to the pillow blocks 115 and free ends of thehubs, and engaging the races of the bearings to hold them in place. Thecasing 112 supports a plurality of stud shafts 110, on which looselyrotate bevel pinions116., The pinions 116a mesh with bevel gears 117 todrive them. 118 indicates axle sections keyed at their inner ends to thehubs of the bevel gears lland connected to the drums 58, 59, to rotatethem,

'preferably through` the interposition of cap vplates 119, keyed uponthe free ends vof the axle sections 118 and connected to the pe-'ripherial edges of the drums 58, 59, by cap screws 120. 121 indicatessleeves surrounding the axleV sections 118 their inner free ends havingflanges which abut against the inner end wall of the hubs 104a toprevent movement' of the sleeves outwardly. The outer ends or extendedportions of the .sleeves serve as bearings for the drums 58, 59, torotate on, bushings being mounted on the k sleeves to provide suitablebearing surfaces.

- section 118 and interposed between the adj a'- cent hub 113 of thecasing 112 and inner end of the 'adjacent sleeve.121. The inner end ofeach dust sleeve fits within the end of the 'adjacent hub 113' and itsopposite end is flanged at 123a to abut the flange of the sleeve 121.124 indicates a coiled spring surroundflange 123 and arranged to actv onthe latter to-'lnaintain it in close engagement with the flange of thesleeve 121.

125 indicates as an entirety means for holding, locking/or connectingeach drum 58, 59, to the adjacent disk or-member 104 which, be-

ing fixedwto the frame 34 in the manner alread described', serves toprevent rotation of the rum by the power transmitting or differentialmechanism 42 when the motor 41 is ,operated. As the holding means forthe drums 58, 59, are similar in construction, the description of one ofthem will suliice for both. Each said holding means 125 preferablycomprises a lock, preferably of the friction type, one element of whichis carried by the drum lll . 130 to freely slide on the pins 133. Theopenings 132 and pins 133 are preferably disposed l lpins 133I supportedin openin 1n the supporting disks 104. The openingsl conical shape toform a friction engaging surface 128 with which the friction engagingsurfaceor wall 129 ofthe movable lock element 130 engages. The lockelement 130 is of annular shape so as to extend entirely. around thelock element 126. The lock element 130 preferably ,comprises a pair ofrings 130a,

130", connected together, preferably in face to face relation, by anysuitable means, for example, rivets 131. The ring 130a is preferablyformed from bronze and carries at its outer peripherial edge a angeportion which forms the wall 1:29l which engages the lock element 126;the ring 130b is formedfrom soft iron, so that it may serve as anarmature to effect separation of the lock elements in the manner to belater described. By forming the ring 1308L of bronze, that wall of `thelock element 130 which engages and disengages the lock element 126 willfreely disengage the latter, since the metal of which it is formed isnonmagnetic, land hence it will not stick to the lock element 126 whenthe armature is acted upon, as will later appear. 132'indicates a set ofopenings formed in the lock element 130 and spaced from each othertherearound and arranged to receive supporting and guiding 133aL formed132 are of a size to permit the lock element in outer and inneralnnularseries, so`thatithe lock releasing means may be disposed substantiallymidway between the outer and inner edges of the lock element ,130. 135indicates springs coiled around certain of the pins 133- and 'disposedbetween the lock element 130 and inner face of the disk ormember 104.'

The springs 135 normally operate to move the lock element 130V laterallyon the-pins 133 into engagement with the'lock element 126, so that thedrum to which the rim is connected and the adjacent disk or member 104purpose of zvhich is to hold-or lock the drum against rotaion. f l Ofthe releasing means, indicated as an entirety at 136, 136, indicateswindings or coils carried by the disks or members 104 and arranged, whenenergized to attract the lock rings or armatures 130". and thus move therings 130 laway, or to "-eifect disengagement thereof, from the lockelements 126. As -xboth releasing means are similar in construction, butone thereof need'be described. As shown in the drawings, the coil 1,36is preferably of rin(r shape and fits into4 an annular recess 13?formedd'n the face of the supporting disk 104. 138 indicates openingsformed in the disk l104 and spaced therearound to receive bolts 139, theheads of which over-lie the coil 136a to hold it in the recess 137. Theinner face of the disk 104 is countersunk to receive the heads of thebolts 139 and the recess 137 Vis formed deep enough to receive the coiland permit the bolt heads to engage its outer surface. The arrangementprevents the bolt heads from projecting beyond the inner face of thedisk 104 and also prevents the armature from actually contacting withthe coil 136. 140, 141 indicate the terminals of the ends of the coils,each terminal being mounted in an insulating bushing "142 which in4 turnyis mounted and fixed in an opening 142 formed in the disk 104. Theterminals are connected to the batteries 36 by leads in the manner to`be later described'. From the lforegoing description it will beunderstood that the lock elements are normally engaged, through theother driven element is locked or held against i movement. Accordingly,it will be seen that if the releasing means 136 for one lock'is operatedto disengage the elements thereofand tg'he motor 41 is set in motion,the power thereof will be transmitted through the power transmitting ordifferential mechanism'42 to rotate the drum vwhich has been released'and thus'eifect the winding of the rope 40 or 57 thereon or therefromaccordingly as the motor is driven in'one direction or the other.

The circuits to thel coils 136a may be closed by separate switch devicesto energize 'the coils independently and a separate circuit for themotor 41 losed by a suitable controller, may be provided; but tosimplify the con` e struction of the mechanlsm, as wel as to simthateither coil may be connected in series I with the motor, wherebyl theoperation of the controller to .drive the motor 1n either direction willsimultaneously effect the operation of leither releasing means and theunlocking of the lock acted on thereby to permit operation of theadjacent operating means 43 or 44. As a result either-drum 58, 59, maybe rotated in one direction or the other to swing thel boom' 40 aboutits pivot pin 52 or to raise or lower the load engaging device 55, asdesired. `To carry out these operations, I provide (1) a lever 143,pivotally mounted on the dash 15 and connected through an arm 144 andlink 145 with a crank arm 146, which is connected to the shaft of acontroller indicated as van entirety at 147; and (2) a lever 148,pivotally mounted on the dash 15, and connected through an arm 149 and alink 150 with a crank arm 151 which is connected to the shaft of acontrollervor switch device 152. rlhe purpose of the controller 147 is lthe motor 41, so that upon the operation of described.

the cont-roller lever` 143, the'selected drum will be rotated in onedirection or` the other., zliccording to the direction of movement ofthe ever.

The selector lever 148 is shown in a neutral position in Fig. 2, Ythatis, that position in which neithercoil 136a is connected in the circuitof the motor and batteries, but by movement of the lever to the right orleft, one of the coils may be connected in the circuit as alreadydescribed. This arrangement insures the complete cutting out of one coiland its de-energization before the other coil can be connected. to it.rlhe operation ofthe leversl43 andv 148 and the controllers 147, 152,operated thereby, respectively, will be more clearly understood from thediagrammatic view (Fig. 10), which will be later rllhe motor 41 ispreferably of the electric type in order that it `may be operated frombatteries and co-operate with theoperation of the means for releasingthe drum holding means herein illustrated and described; but

i it will be understood that the holding means and the motor may beoperated in some other manner without departing from the scope of theinvention. The motor 41 may be of of any desired construction. 1tpreferably has associated with it a brake mechanism, indicated as anentirety at 153, to stop the rotation of its shaftand elements driventherenected to each other that upon"n thel movement casing. The arm 158aof the lever 159 is connected to one end of a spring 160. rPhe spring160 operates to move the lever 157al in that direction whichapplies thebrake shoes and thus normally keeps the latter in braking position. Torelease the brake shoes, the lever 159 is rocked about the pivot orshaft 159a in the opposite direction, this operation being -preferablyeffected by a solenoid 161, the

core of which is connected by a link 162 with the arm 158c of the lever159. The winding on the solenoid is connected in series with the circuitto the motor as will later be set forth in connection with Figm'l() sothat when the circuit is closed the solenoid is energized andautomatically eects the vrelease of the brake shoes; likewise, u on theopening of the motor circuit the so enoid winding is de-energized andthus permits the spring 160 to auor downwardly by winding the rope 40 onor unwinding it from the drum 58 and the support 34 is swung or rotatedabout the shaft 33 by the operation of a suitable motor (not shown) Themovement of each of these elements is automatically stopped when movedin either direction (except in the downward movement of the loa-dengaging element 55) at a predetermined position by a mechanism whichopens the circuit to the motor that operates such element. rlhemechanisms for stopping'the movements just referred' to may be similarin construction, each being preferably similar in construction yto themechanism which forms the subject matter of my copending applicationSerial No. 610,791. The mechanism for stopping the swinging or rotationofthe frame 34, comprises a switch means enclosed in a casing 163'; themechanism for stopping the movement of the boom 40 comprises a switchmeans enclosed in caselement 55 comprises a switch means enclosed in acasing 169 carried by the boom 40, a flexible connection 170 connectedat one end to the :mmv 171 of the switch means and leading over sheavesmounted on the boom 40 and connected at its opposite end to a weight174, which is disposed inthe path of movement izoI of the casing 56. Thearm 171 is connected to a spring 175 which tends to swing the arm in onedirection-that direction vwhich will operate the switch means to openthe circuit. The arm is moved in the other directionthatY directionwhich operates the switch means to close the circuit-'by `the welght174, so that if@ the casing 56 is elevated far a result, t

enough to lift the weight, the spring 175 will move the arm 171 and thruit e'ect the opening of the circuit thru the switch means. As motor 41.will be automatically stopped.

Referrin to Fig. 10: the traction motor 4\ sides of the batteries 36.180 indicates'a connection in the circuit leads 179, 179, which permitsthe batteries to be connected with the terminals on with a charging plugto recharge the batteries.

The circuit for the motor 76 ma be tracedV as follows: from the terminal1 8a by the lead 18,0 to the terminal 181 of the switch means 163; ifthe frame 34 is .to be rotated to the right, the circuit is through thelead 182 to terminal 183, across contact 184 to terminal 185, lead 1.86,winding of brake solenoid, lead 187 to brush 188, from brush 189 to lead190, terminal 191, contact 192, terminal 193, lead 193', terminal 194,iield coil 195, terminal 196 and lead 197 to terminal 178. If the frame34 is to be rotated to the left as shown in Fig. 2,' the circuit istraced as follows: terminal 178, lead 180', terminal 181, lead 198,terminal 199, contact 200, ter minal 191, lead 190, brush 189, brush188, lead 187, winding of brake solenoid, lead 186, terminal 185,contact 201, terminal 193, lead 193', terminal 194, field coil 195,terminal 196 and lead 197 to terminal 17 8.

If the boom 40 isto be raised, the circuit r`forthe motor 41 and theelectro-magnet to `be connected in series with the motor 41 sov as torelease the, clutch 130 whichholds the drum 58, is traced as follows:from terminal 17 8, througlrlead 202, Winding of brake solenoid, lead203, winding. 136* of magnet 136 y adjacent the drum 58 (see Fig. 5),lead 204,

` tor brushes, terminal -217, lead 217, termiv terminal 205 of switchmeans 165, terminal 206, lead 207, contact 208, contact 209,terminal/210 of the selector switch 152, lead 211, terminal 212 of thecontroller 147, contact 213terminal 214, lead 215,.terminal 216, mo-

nal 218, contact 219, terminal 220, leads 221,

222, field coils 223 and lead 224 to terminal.

178; if the boom 40 is to be lowered, the circuit is as follows: fromterminal 17 8, through lead 202, winding of the brake solenoid, lead203, winding 136a of magnet 136, ,lead 204, terminal 205 of switch means165, terminal 225, lead 226, terminal 227 of the selector switch 152,contact 228, terminal 229, lead 230, 'terminal 231 of the'controller 147contact 232, terminal 218, lead 217 a, terminal 217, motor brushes,terminal 216, lead 215, terminal 214, contact 233, terminal 234, lead235, lead 222, ield coils 223 and lead 224 to terminal 178.

If the load engaging element 5 5 is to be raised, the circuit may betracedas follows: from the terminal 17 8a, through lead 202, winding ofthe brake solenoid, lead 237, winding 136EL of the releasing means 136adjacent the drum 59, lead 238, terminal 239 of switch means 169,terminal M0, lead 241, terminal 242, Contact 243,iterminal 210, lead211, terminal 212, contact 213, terminal 214, lead 215, terminal 216,brushes of motor 41, terminal 217, leadl 217, terminal 218.contact 219,terminal 220, leads 221, 222, field coils 223 of motor and lead 224 toterminal 17 8. If the load engaging element is to be lowered, thecircuit may be traced as follows: from terminal 178a through lead 202,winding of brake solenoid, lead 237 winding 136 of the releasing means136,' lead 244, terminal 245, contact 246, terminal 229, lead 230,terminal 231, Contact 232, terminal 218, lead 217 a, terminal 217,brushes of motor, terminal 216, lead 215, terminal 214,

field co'ls 223 and lead 224 to terminal 17 8.

247 is a resistance arranged to be connected inv shunt with the motorcircuit when the motor is operated to lower the boom 40 or the `loadyengaging member 55, to prevent acceleration in the speed of the motorshaft.

From the foregoing description it will be seen that have provided a.load handling mechanism in Awhich' the load may be moved or operated inany one of a plurality of directions in a rapid and simple manner, forexample, by a raising or lowering of the loadengaging member, and by araising or lowering of the boom; such operations being effected byproviding locking means for certain elements through which the power ofthe mtor is transmitted to driven means and causing a release of one vofsuch elements accordingly as one movementl of the load or another isd'esired. While I have shown an electrically operated means foroperating-that is, ryeleasing-' either clutch, it will be understoodthat other types of release means may be employed.

MIn my construction I am enabled to eiect contact 233, terminal 234,lead 235, lead 222,

thevarious operations of the load engaging as adapting it to aconstruction in which thev loading engaging member is controlled in itsl vertical and to ping movements by iiexible members woun on and off thedrums.

'- and the controller actuated thereby are arranged to'be set at aneutralposition, at which time neither electro-magnet winding isenergized, and that they must be moved in one direction or-.Kthe otherto effect the operation (release) of the desired clutch elements. Bythis arrangement I insure the (le-energizing of oneA magnet windingprior to the energizing of the other magnet ivinding,so that properoperations of the load engaging member and boom to handle the load asdesired are eii'ected in a rapid and positive manner.

'To those skilled in the art to whichmy iiivention relates manyalterations in construction and widely differing embodiments andyapplications of the invention will suggest themselves withoutdepartingfrom the spirit and scope thereof. rThe disclosuresV and the descriptionherein are purely illustrative and are not intended to be in any senselimiting.

What I claim is:

l.' In apparatus of the class described, the combination with a frameand a source of power supply thereon, lof a motor, connections betweensaid motor and said source of power supply, a plurality of mechanismsconnected in driving relation with said motor for handling andpositioning a load, separate means between said frame and each of saidmechanisms for normally holding the latter against movement, and meansfor releasing each of' said holding means, and meansl for selectivelyconnecting either oitl said holding means into the connectioiisbetweensaid motor and said source of power, whereby the latter operates 011e ofsaid holding means when thc motor is operated. 1

2. In apparatus oitl the class described, the combination with a frameandfa source of power supply thereon, of a motor arranged to beconnected with said source o power supply, a plurality of mechanismsconnected in driving relation with said motor for han'- dling andpositioning a load, separate means between said frame and each of saidmechanisins for normally holding the latter against movement, and meansforselectively releasing either of said holding means, the operation ofsaid releasing means being dependent upon the supply of power to saidmotor, but independent of its direction of rotation.

3. In apparatus of the class described, the combination' with a frameand a source of electric power supply thereon, of an electric motorarranged to be connected with said source of power supply, aplurality ofmechag nisms connected in driving relation with said motor for handlingand positioning a load, separate means between said frame and each ofsaid mechanisms for normally holding the latter against movement, meansfor-connecting said motor with said source of power supply to drive itin either directio i, sepa' rate magneticmeans for releasing each of.said holding means, and a selective mechanism arranged to connecteither of said magnetic means in the motorcircuit, whereby one ofsaidmeans is operated when the motor is started. a

4. l'In apparatus of the class described, the

combination with a frame, of a source of electric power supply, anelectric motor arranged to be connected with said source of powersupply, a plurality of mechanisms connected in connection in the motorcircuit, in series withV said motor, a selector for connecting any ofsaid leads into the Ymotor circuit and a circuit closer tor said motorcircuit.

driving relation with said `motor for handling 5. In apparatus of theclass described, the

. plurality of mechanisms connected :in driving relation with said motorfor handling and positioning a load, means between said frame and eachof said mechanisms for normally holding the latter against movement,means dependent upon the supply of power to said motor for releasingeither of said holding means, and a selective means for effectingoperation of one of said releasing means when the motor is connected tosaid source of power supply. s l

6. In apparatus of the class described, the combination with a frame anda source of power supply thereon, of a motor, connections betweensaidmotor andsaid source of power supply, a plurality ofmechanisins'connected in driving relation with said motor for handlingand positioning a load`,spring operated means between said iframe andeach of said mechanisms for normally holding the latter againstmovement,'means for connecting said motor with said source of. supply todrive it in eith- -er direction, releasing means for each of saidholding means arranged to operate simultaneously with the completing ofthe connection between said motor and said source of power supply, andmeans for selectively connecting either of said releasing means withsaid connections between'said motor and said source of power supply. y

7. In apparatus o theclass described, the combination with a frame and asource of electric'current lsupply thereon, of an electric motorarranged to be connected with said source of supply, a plurality ofmechanismsr connected in driving relation with said motor for handlingand positioning loads, means between said frame and each of saidmechallO Jinisms arranged to normally hold the latter against inovement,magnetically operated means for' releasing each of said holding means,and selective means for connecting either of said magnetically operatingmeans `in the circuit between said motor and said source of supplypWherebysaid releasing means are actuated and the motor driven in onedirection.

8. In apparatus of the class described, the combination with a frameAand a source of electric current" supply, of an electric motor arrangedto be connected with said source ofsupply, a plurality of mechanismsconnected in driving relation with said motor for handling andpositioning loads, means between- 'said frame and each of saidmechanisms-arranged to normally liold the latter against movement,magnetically operated means pr releasing each of saidahglding means,means for connecting said motor with said source of supply, and meansfor selectively connecting y in series in the circuit between said motorand said source of supply either of said magnetically operatingreleasing means, whereby the connection of said motor with said sourceof supply will simultaneously eiiect the operation of one of saidreleasing means.

- 9; In apparatus of the class described, the combination with a frameand a source. of

electric current supply, of an electric motor. arranged to be connectedwith lsaid source oi supply, a plurality of mechanisms connected indriving relation with said motor for handling and positioning loads,means between said frame and each of said mechanisms arranged tonormally hold the latter against movement, magnetically operated meansfor lreleasing each of said holding means, means for connecting saidmotor with said source of supply to drive`it in either direction, andmeans for selectively connecting in series in the circuit between saidmotor i and said source of supplycither of said magcombination withy aframe and aso-nrce. of

power supply thereon, of a motor. arranged to be connected with saidsource of power supply,'a differential mechanism having a'main gearconnected in driving relation with said motor, separate means connectedrespectively in driving relation with the driven elements of saidmechanism for handlingand positioning'a load, devices between said frameand each of said means for normally holdingthe latter against/movement,means forV connecting` said motor with said' source of power supply todrive it in either direction, means for releasing either of. said,holding means,

.nism for handling and positioning a load, W

devices between said frame and each of said operating means for normally'holding the latter against movement, means for connecting said motorwith said source of power ,I

supply to drive it in either direction, means for releasing each of saidholding devices, said releasing means being arranged to operatesimultaneously with the completing of i the circuit between said motorand said source of power s pply, and selective means for connectingeiilier of said releasing means in the circuit in series with saidmotor.

l2. In apparatus of the class described, the

combination with a frame and a source of electric current supply, .0f anelectric motor arranged to be connected with said source of Supply maingear connected with'iand driven by s aid motor, separate operating meansrespectively connected with the' driven elements ot said mechanism forhandling and positioning loads, brake devices between said frame andeach of said operating means arranged to hold the latter againstmovement, magnetically operated means for releasing either of said brakedevices, means for connecting said motor with said source of supply, andmeans for selectively connecting in seriesin thecircuit between saidmotor and said source oi supply either of said magnetically operatingreleasing means, whereby theconnection of `said moto'r with said sourceof supply will simultaneously effect the operation of one 0f said-releasing means.

ka dii'erentialffmechanism having a` .13. In apparatus of the classdescribed, the I combination .with a frame and Ya source of electriccurrent supply, of an electric. motor differential mechanism having amain. rate operating means respectively co nected with the drivenelements'of said mechanism obe connected with said source of rconnected4 with said motor, sepa-l .1,

for handlijng and positioning loads, devices between said frame and eachof said. operating means arranged to hold the latter against movement,magnetically operated means for releasing either' oitl said holdingdevices, means for connecting saidvmotor with said source of supply todrive it in either .direction, and meansfor selectively connecting inseries inthe circuit between said motor and said source of supply eitherof said magnetically operating releasing means irrespective of the'direction of rotation of said motor, whereby the connection of saidmotor with said source of supply will simultaneously effect theoperation of one of said releasing means.

14. In apparatus of the class described, the combination witha' frameand a source of electric current supply, of an electric motor arrangedtobe connected with said source of supply, a dierential mechanism havinga maingear connected to said motor, a pair of drums connected tothe-driven elements of said differential mechanism, load handlinmembers, movable relative to said frame an each other and eachconnectedby a flexible i member with one of said drums, devices between saidframe and each drum and arranged to hold the latter against movement,magnetically oerated means for releasing 4 each of said ho ing devices,means yfor con'- necting said mot r with said source of supply,

and means for selectively connecting in serlesA in the circuit betweensaidy motor and said' source of supply either of said magneticallyoperating releasing means, whereby the conl nection of said motorwithsaid source of supply will simultaneously eiect the operation of.one of said releasing means.

In testimony whereof, I have hereunto subscribed my name'. 1 f' EDWARDH. REMDE.

